{"id":4559,"date":"2021-10-11T23:38:43","date_gmt":"2021-10-11T14:38:43","guid":{"rendered":"https:\/\/column.prime-strategy.co.jp\/?p=4559"},"modified":"2026-02-17T02:09:31","modified_gmt":"2026-02-16T17:09:31","slug":"post-4559","status":"publish","type":"post","link":"https:\/\/kusanagi.tokyo\/column\/archives\/column_4559","title":{"rendered":"PHP\u306e\u91cd\u93ae\u5ee3\u5ddd\u985e\u6c0f\u306e\u30b3\u30e9\u30e0\u300cPHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 8.1\u3067\u5c0e\u5165\u3055\u308c\u308b\u65b0\u6a5f\u80fd\uff08\u7b2c20\u56de\uff09\u300d"},"content":{"rendered":"\n

\u4eca\u5e74\u3082\u56fd\u5185\u6700\u5927\u7d1a\u306ePHP\u95a2\u9023\u30a4\u30d9\u30f3\u30c8\u3067\u3042\u308bPHP\u30ab\u30f3\u30d5\u30a1\u30ec\u30f3\u30b9 2021\u304c10\u67082\u65e5\uff5e3\u65e5\u306e\u4e8c\u65e5\u9593\u306b\u308f\u305f\u308a\u958b\u50ac\u3055\u308c\u307e\u3059\uff0e\u6628\u4eca\u306e\u72b6\u6cc1\u304b\u3089\u6628\u5e74\u306b\u7d9a\u304d\u4eca\u5e74\u3082\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u958b\u50ac\u3055\u308c\u307e\u3059\uff0e\u3053\u306e\u30ab\u30f3\u30d5\u30a1\u30ec\u30f3\u30b9\u3067\u306f\uff0c40\u4ef6\u4ee5\u4e0a\u306e\u767a\u8868\u304c\u884c\u308f\u308c\uff0cPHP\u95a2\u9023\u306e\u6700\u65b0\u306e\u60c5\u5831\u3092\u5f97\u308b\u826f\u3044\u6a5f\u4f1a\u3068\u306a\u308b\u306f\u305a\u3067\u3059\uff0e\u3044\u3088\u3044\u3088\u30ea\u30ea\u30fc\u30b9\u304c\u8fd1\u304f\u306a\u3063\u3066\u304d\u305fPHP 8.1\u95a2\u9023\u306e\u8a71\u984c\u3082\u63d0\u4f9b\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\uff0e\u672c\u7a3f\u3067\u306f\uff0c\u524d\u56de\u306b\u5f15\u304d\u7d9a\u304dPHP 8.1\u306b\u304a\u3051\u308b\u5909\u66f4\u70b9\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n

<\/span>PHP 8.1\u306e\u958b\u767a\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb<\/span><\/h2>\n\n\n\n

PHP 8.1\u306e\u958b\u767a\u3067\u306f\uff0c7\u670820\u65e5\u306b\u30d5\u30a3\u30fc\u30c1\u30e3\u30fc\u30d5\u30ea\u30fc\u30ba\u304c\u884c\u308f\u308c\u305f\u5f8c\uff0c7\uff5e8\u6708\u306b\u30d9\u30fc\u30bf\u7248\uff0c\uff19\uff5e11\u6708\u306b\u30ea\u30ea\u30fc\u30b9\u5019\u88dc\u7248\u306e\u30ea\u30ea\u30fc\u30b9\u304c\u4e88\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u672c\u7a3f\u57f7\u7b46\u6642\u70b9\u3067\u306f\uff0c9\u670816\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u30ea\u30ea\u30fc\u30b9\u5019\u88dc2\u7248\uff08RC2\uff09\u304c\u6700\u65b0\u3068\u306a\u3063\u3066\u3044\u307e\u3059\uff0e\u3053\u306e\u307e\u307e\u958b\u767a\u304c\u9806\u8abf\u306b\u3044\u304f\u3068\uff0c\u6b63\u5f0f\u7248\u304c11\u670825\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\uff0e<\/p>\n\n\n\n

<\/span>final\u30af\u30e9\u30b9\u5b9a\u6570<\/span><\/h2>\n\n\n\n

\u3000PHP\u3067\u306f\uff0c\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9\u306b\u304a\u3044\u3066\u5b9a\u6570\uff08\u30af\u30e9\u30b9\u5b9a\u6570\uff09\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e\u5f93\u6765\uff0c\u3053\u306e\u30af\u30e9\u30b9\u5b9a\u6570\u306e\u5024\u3092\u5b50\u30af\u30e9\u30b9\u3067\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\uff0e\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n

\u3000PHP\u3067\u306f\uff0c\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9\u306b\u304a\u3044\u3066\u5b9a\u6570\uff08\u30af\u30e9\u30b9\u5b9a\u6570\uff09\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e\u5f93\u6765\uff0c\u3053\u306e\u30af\u30e9\u30b9\u5b9a\u6570\u306e\u5024\u3092\u5b50\u30af\u30e9\u30b9\u3067\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\uff0e\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e\n\n<?php\n class Foo {\n     public const X = \"foo\";\n }\n class Bar extends Foo {\n     public const X = \"bar\";   # \u66f8\u304d\u63db\u3048\u53ef\u80fd\n }<\/code><\/pre>\n\n\n\n
\u3000\u3053\u3053\u3067\u306f\uff0cFoo\u30af\u30e9\u30b9\u306e\u5b50\u30af\u30e9\u30b9\u3068\u3057\u3066Bar\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\uff0c\u30af\u30e9\u30b9\u5b9a\u6570X\u306e\u5b9a\u7fa9\u3092\u66f8\u304d\u63db\u3048\u3066\u3044\u307e\u3059\uff086\u884c\u76ee\uff09\uff0e<\/p>\n\n\n\n
\u3000PHP 8.1\u3067\u306f\uff0c\u30af\u30e9\u30b9\u5b9a\u6570\u306e\u5b9a\u7fa9\u6642\u306bfinal\u6307\u5b9a\u5b50\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e\u3053\u308c\u306b\u3088\u308a\uff0c\u5b50\u30af\u30e9\u30b9\u3067\u30af\u30e9\u30b9\u5b9a\u6570\u306e\u5024\u3092\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\uff0e\u4e0a\u306e\u30b3\u30fc\u30c9\u306bfinal\u6307\u5b9a\u5b50\u3092\u8ffd\u52a0\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
<?php\nclass Foo {\n     final public const X = \"foo\";   # final\u6307\u5b9a\n}\nclass Bar extends Foo {\n     public const X = \"bar\";   # \u30a8\u30e9\u30fc\u767a\u751f\n}<\/code><\/pre>\n\n\n\n
\u3053\u306e\u5834\u5408\uff0c\u5b50\u30af\u30e9\u30b9Bar\u306e\u5b9a\u7fa9\u306b\u304a\u3044\u3066\u30af\u30e9\u30b9\u5b9a\u6570\u306e\u5024\u3092\u66f8\u63db\u3048\u3088\u3046\u3068\u3057\u305f\u969b\uff08\uff16\u884c\u76ee\uff09\uff0c\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3057\u307e\u3059\uff0e\u3053\u306e\u6a5f\u80fd\u306b\u3088\u308a\uff0c\u610f\u56f3\u306b\u53cd\u3057\u305f\u5b9a\u6570\u306e\u66f8\u304d\u63db\u3048\u3092\u9632\u6b62\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n
<\/span>new\u306b\u3088\u308b\u5f15\u6570\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u6307\u5b9a<\/span><\/h2>\n\n\n\n
\u3000\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306b\u304a\u3044\u3066\uff0c\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e\u3057\u304b\u3057\uff0c\u5f93\u6765\uff0c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5f15\u6570\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3068\u3057\u3066\u6307\u5b9a\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\uff0e\u3053\u306e\u305f\u3081\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3044\u3063\u305f\u3093null\u3092\u6307\u5b9a\u3057\u305f\u4e0a\u3067\uff0c\u30e1\u30bd\u30c3\u30c9\u306e\u4e2d\u3067new\u306b\u3088\u308a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\uff0c\u4ee3\u5165\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\uff0e<\/p>\n\n\n\n
class Test { \n    private Logger $log;\n    public function __construct(?Logger $log = null) {\n        $this->log=$log ?? new NullLogger;\n    }\n}\n<\/code><\/pre>\n\n\n\n
PHP 8.1\u3067\u306f\uff0c\u5f15\u6570\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u6307\u5b9a\u6642\u306bnew\u306b\u3088\u308b\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\uff0e\u4e0a\u306e\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30b7\u30f3\u30d7\u30eb\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n
class Test { \n    public function __construct(private Logger $log = new NullLogger) {}\n}\n<\/code><\/pre>\n\n\n\n
\u3000\u3053\u306e\u4f8b\u3067\u306f\uff0c\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u304a\u3044\u3066\uff0c\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u5909\u6570\u3068\u3057\u3066Logger\u30af\u30e9\u30b9\u306e\u5909\u6570$log\u3092\u5b9a\u7fa9\u3057\uff0cNullLogger\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4ee3\u5165\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n
<\/span>\u9ad8\u901f\u30cf\u30c3\u30b7\u30e5\u95a2\u6570<\/span><\/h2>\n\n\n\n
\u3000PHP\u3067\u306f\uff0c\u975e\u6697\u53f7\u5b66\u7684\u30cf\u30c3\u30b7\u30e5\u95a2\u6570hash\u306b\u304a\u3044\u3066\uff0c\u30cf\u30c3\u30b7\u30e5\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\uff0ePHP 8.1\u3067\u306f\uff0c\u73fe\u6642\u70b9\u3067\u6700\u901f\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4e00\u3064\u3067\u3042\u308bMurmurHash3\u304a\u3088\u3073xxHash\u3092\u6307\u5b9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n
\u3000MurmurHash3\u306b\u3088\u308a\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u6c42\u3081\u308b\u4f8b\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n
\n$hash=hash('murmur3f', $content);\n\n<\/code><\/pre>\n\n\n\n
\u3000hash\u95a2\u6570\u306e\u7b2c\u4e00\u5f15\u6570\u306b\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\uff08\u2019murmur3f\u2019\uff09\uff0c\u7b2c\u4e8c\u5f15\u6570\u306b\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u6c42\u3081\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u6307\u5b9a\u3059\u308b\u3068\uff0c\u30cf\u30c3\u30b7\u30e5\u5024\u304c\u8fd4\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n
\u3000\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u6c42\u3081\u308b\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306e\u4f8b\u3068\u3057\u3066\uff0c\u5358\u4f4d\u6642\u9593\u306b\u5b9f\u884c\u3067\u304d\u308b\u56de\u6570\u3092\u4e0b\u56f3\u306b\u793a\u3057\u307e\u3059\uff08\u74b0\u5883\uff1aRyzen 5 2400G, Ubuntu 20.04\uff09\uff0e\u3053\u3053\u3067\u306f\uff0csha256\u95a2\u6570\u30921\u3068\u3057\u3066\u6b63\u898f\u5316\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
Sha256\u306b\u6bd4\u3079\u3066NurmurHash3\u95a2\u6570\u306f6\uff5e8\u500d\uff0cxxHash\u95a2\u6570\u306f9\uff5e12\u500d\u9ad8\u901f\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n
<\/span>ENT_QUOTES\/SUBSTITUTE\u6a19\u6e96\u5316<\/span><\/h2>\n\n\n\n
\u3000PHP 8.1\u3067\u306f\uff0cHTML\u95a2\u9023\u306e\u95a2\u6570htmlentities()\uff0chtmlspecialchars()\u306b\u304a\u3044\u3066\uff0cENT_QUOTES\u304a\u3088\u3073ENT_SUBSTITUTE\u304c\u6a19\u6e96\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u3057\u3066\u6307\u5b9a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e\u3053\u308c\u306b\u3088\u308a\uff0c\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\uff08\u2019\uff09\u304a\u3088\u3073\u7121\u52b9\u306a\u6587\u5b57\u304c\u81ea\u52d5\u7684\u306b\u5b89\u5168\u306a\u6587\u5b57\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u5909\u63db\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n
\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n
<?php\n$str = \"A 'quote' is <b>bold<\/b>\";\necho htmlentities($str);\n<\/code><\/pre>\n\n\n\n
\u5f93\u6765\u306ePHP\u3067\u306f\uff0c\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u306a\u3044htmlentities\u95a2\u6570\u3067\u306f\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u304c\u5909\u63db\u3055\u308c\u305a\uff0c\u305d\u306e\u307e\u307e\u51fa\u529b\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n
A 'quote' is &lt;b&gt;bold&lt;\/b&gt;<\/code><\/pre>\n\n\n\n
PHP 8.1\u3067\u306f\uff0c\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u3067\u3082\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u304cHTML\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u5909\u63db\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n
A &#039;quote&#039; is &lt;b&gt;bold&lt;\/b&gt;<\/code><\/pre>\n\n\n\n
\u6b21\u306b\u7121\u52b9\u306a\u6587\u5b57\u30b3\u30fc\u30c9\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u3092\u8003\u3048\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u306f\u6587\u5b57\u5217$str\u306b\u7121\u52b9\u306a\u6587\u5b57\u30b3\u30fc\u30c9\uff08\\xff\uff09\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\uff0e\u3053\u308c\u306f\u4e0d\u6b63\u306a\u6587\u5b57\u3092\u633f\u5165\u3057\uff0c\u3053\u308c\u3092\u51e6\u7406\u7cfb\u304c\u524a\u9664\u3059\u308b\u3053\u3068\u3067\u4e0d\u6b63\u306a\u6587\u5b57\u5217\u3092\u51fa\u73fe\u3055\u305b\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u653b\u6483\u306b\u95a2\u3059\u308b\u30b3\u30fc\u30c9\u3067\u3059\uff0e<\/p>\n\n\n\n
<?php\n$str = \"java\\xffscript:alert('XSS')\";\necho htmlentities($str);\n<\/code><\/pre>\n\n\n\n
\u5f93\u6765\u306ePHP\u3067\u306f\uff0c\u6587\u5b57\u5217\u306b\u7121\u52b9\u306a\u6587\u5b57\u304c\u542b\u307e\u308c\u308b\u3068\u6587\u5b57\u5217\u5168\u4f53\u304c\u51fa\u529b\u3055\u308c\u307e\u305b\u3093\u3067\u3057\u305f\uff0ePHP 8.1\u3067\u306f\uff0c\u7121\u52b9\u306a\u30b3\u30fc\u30c9\u3092Unicode\u306e\u7f6e\u63db\u6587\u5b57\uff08U+FFFD\u307e\u305f\u306f&#FFFD;\uff09\u306b\u7f6e\u63db\u3059\u308b\u30aa\u30d7\u30b7\u30e7\u30f3ENT_SUBSTITUTE\u304c\u6a19\u6e96\u3067\u6307\u5b9a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e\u51fa\u529b\u306f\u4ee5\u4e0b\u3068\u306a\u308a\uff0c\u7121\u52b9\u306a\u30b3\u30fc\u30c9\u304c\u2018\ufffd\u2019\u3067\u7f6e\u63db\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n
java\ufffdscript:alert(&#039;XSS&#039;)<\/code><\/pre>\n\n\n\n
\u3000\u4eca\u56de\u306f\uff0cPHP 8.1\u306b\u304a\u3051\u308b\u6a5f\u80fd\u5f37\u5316\u306e\u30dd\u30a4\u30f3\u30c8\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3057\u305f\uff0ePHP 8.1\u306e\u30ea\u30ea\u30fc\u30b9\u5019\u88dc\u7248\u306e\u30c6\u30b9\u30c8\u306b\u53c2\u52a0\u3044\u305f\u3060\u304d\uff0c\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u8a66\u3057\u3066\u3044\u305f\u3060\u3051\u308c\u3070\u3068\u601d\u3044\u307e\u3059\uff0e<\/p>\n","protected":false},"excerpt":{"rendered":"
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Read more<\/a><\/p>\n","protected":false},"author":14,"featured_media":1280,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[15],"tags":[110],"series":[50],"journey":[99],"product":[],"class_list":["post-4559","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","tag-technical-guides","series-php-column-hiirokawa","journey-run","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33","no-featured-image-padding"],"yoast_head":"\nPHP\u306e\u91cd\u93ae\u5ee3\u5ddd\u985e\u6c0f\u306e\u30b3\u30e9\u30e0\u300cPHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 8.1\u3067\u5c0e\u5165\u3055\u308c\u308b\u65b0\u6a5f\u80fd\uff08\u7b2c20\u56de\uff09\u300d - KUSANAGI Tech Column<\/title>\n<meta name=\"description\" content=\"\u4eca\u79cb\u958b\u50ac\u4e88\u5b9a\u306ePHP\u30ab\u30f3\u30d5\u30a1\u30ec\u30f3\u30b92021\u3067\u306f\u3001PHP 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